CN104502556A - Performance evaluation device and method for seawater circulating cooling water treating agent for electric power system - Google Patents
Performance evaluation device and method for seawater circulating cooling water treating agent for electric power system Download PDFInfo
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Abstract
The invention relates to the technical field of seawater circulating cooling water treatment and particularly relates to a performance evaluation device and method for a seawater circulating cooling water treating agent for an electric power system. The device comprises a water replenishing unit, a heat exchange unit, a cooling tower unit, a pollution discharging unit, a dosing unit and a monitoring unit. The device is characterized in that the monitoring unit comprises a corrosion monitoring unit arranged on a circulating water pipeline of the heat exchange unit; and the heat exchange unit comprises an analog steam condenser (15) in which an electric heating element is arranged. By using the whole set of device, the online monitoring on a plurality of seawater circulating water treatment process parameters (temperature, flow rate, pressure, pH value, conductivity, corrosion rate, fouling thermal resistance and the like) and automatic control on a plurality of tasks (dosing, pollution discharging, water replenishing, liquid level, water balance and the like) can be realized, and a more effective hardware supporting platform is provided for the research, development and industrial application of a novel seawater circulating cooling water treatment technology.
Description
Technical field
The present invention relates to circularly-cooling sea water processing technology field, relate generally to a kind of electric system circularly-cooling sea water treatment agent device for evaluating performance and method, be specially a kind of for electric system, under model engineering actual working conditions, circularly-cooling sea water treatment agent is carried out to device and the evaluation method of Comprehensive Assessment.
Background technology
Marine circulating cooling system technology, as an environmental protective, water saving technology, has become coastal enterprise and has solved one of industrial colling new and high technology in short supply.China's marine circulating cooling system technology, through studying for many years, has been successfully completed kiloton to 10 ton engineering mimoir, has defined the complete set technology of power industry application marine circulating cooling system, possess large-scale promotion condition.
The complex system that the marine circulating cooling system of electric system is larger often, laboratory study Fruits popularize is applied to engineer applied, needs the transition that appropriate.According to the demonstration project that puts into operation, adopt the method for circulating cooling dynamic analog test, effectively can simulate actual operating mode in laboratory conditions, Comprehensive Assessment is carried out to technology on circulating cooling water treatment scheme.Inspection circularly-cooling sea water treatment technology scheme is transitioned into the feasibility of engineer applied from fundamental research.
Summary of the invention
The technical matters that the present invention solves is: in existing test unit, and majority is applicable to electric system using fresh water as circulatory mediator, and also not having a set of is at present the simulation test device of circulatory mediator with seawater for electric system.
Relative to fresh water, seawater is a kind of high salt, high chlorine and be rich in the complex system of multiple-microorganism, there is using seawater as circulatory mediator stronger corrosivity and larger incrustation trend, therefore, higher to the requirement for anticorrosion of simulation test device, also have higher requirement to the material of monitoring analysis equipment and performance index, the parameter index of monitor and forecast also has obvious difference with fresh water.Meanwhile, relative to chemical system, the circulating cooling system of electric system has that heat exchange point is few, heat exchange amount greatly and the feature relatively concentrated, cooling tower needs to have larger cloth water area, and heat interchanger will have larger heat interchanging area and longer heat-exchange time.
The object of the invention is for electric system marine circulating cooling system characteristic, provide a kind of under model engineering actual working conditions, the test of research marine circulating cooling system, detect dynamic simulation tester and the method for seawater water treatment agent performance.
For above-mentioned technical matters, the invention provides a kind of device for electric system development comprehensive evaluation circularly-cooling sea water treatment agent performance and test method, can be in laboratory conditions, more authentic and valid simulation actual operating mode, Comprehensive Assessment is carried out to aspects such as burn into dirt and microbiological manipulation, the feasibility of inspection circularly-cooling sea water treatment technology scheme.Basis and powerful guarantee is provided for scientific payoffs transforms into engineer applied yield-power fast, safely.
Specifically, for the deficiencies in the prior art, the invention provides following technical scheme:
The invention provides a kind of electric system circularly-cooling sea water treatment agent device for evaluating performance, comprise moisturizing unit, heat exchange unit, cooling tower unit, blowdown unit, dosing unit and monitoring unit, it is characterized in that, described monitoring unit comprises the corrosion monitoring unit be arranged on heat exchange unit circulating water pipework, and described heat exchange unit comprises the simulation condenser 15 that inside is provided with electrical heating elements;
Wherein, moisturizing unit comprises moisturizing pond 3 and water collecting basin 6;
Wherein, described monitoring unit also comprises traffic monitoring unit, temperature monitoring unit and liquid level monitoring unit;
Wherein, described temperature monitoring unit comprises and is arranged at import thermal bulb on heat exchange unit recirculated water source line and discharge pipe 14 and outlet thermal bulb 18 respectively, and is arranged at the temperature sensor of the mensuration electric-heating water temperature on simulation condenser 15.
Wherein, described simulation condenser 15 inside is provided with electrical heating elements, is used for producing electric-heating water, consistent with boiler function, and available boiler replaces.
Preferably, in above-mentioned device for evaluating performance, described simulation condenser external pipeline is provided with the flow switch 17 and the hot water circulating pump 16 that make electric-heating water in condenser 15 form loop.
Preferably, in above-mentioned device for evaluating performance, described corrosion monitoring unit comprises and is arranged at import lacing film box 10 on heat exchange unit recirculated water source line and import corrosion probe 13, the outlet corrosion probe 19 be arranged on heat exchange unit circulating water outlet pipeline, outlet lacing film box 20 and the online corrosion tester of galvanochemistry be connected with described corrosion probe.
Preferably, in above-mentioned device for evaluating performance, described water charging system comprise connect successively with pipeline seawater groove 1, small pump 2, moisturizing pond 3 and water collecting basin 6, be provided with ball-cock assembly 5 in described water collecting basin.
Preferably, in above-mentioned device for evaluating performance, described cooling tower unit comprises natural cooling tower 22 in natural ventilation hyperbolic-type and filler, and described natural cooling tower 22 coolant outlet communicates with described water collecting basin 6.
Preferably, in above-mentioned device for evaluating performance, described monitoring unit also comprises pH monitoring unit and conductance monitoring unit.
Preferably, in above-mentioned device for evaluating performance, described traffic monitoring unit comprises the ebullator 8 be arranged on heat exchange unit source line, spinner-type flowmeter 9, flow transmitter 11 and flow control valve 12.
Preferably, in above-mentioned device for evaluating performance, described liquid level monitoring unit comprises the liquid level sensor 4 be arranged in moisturizing pond 3; Described pH monitoring unit comprises the pH sensor 7a be arranged in water collecting basin 6; Described conductance monitoring unit comprises the conductivity sensor 7b be arranged in water collecting basin 6.
Preferably, in above-mentioned device for evaluating performance, described monitoring unit also comprises pressure monitoring unit, is included in the inlet pressure gauge on heat exchange unit recirculated water turnover pipeline and delivery gauge.
Preferably, in above-mentioned device for evaluating performance, described blowdown unit comprises the electric blowdown valve 21 be arranged on heat exchange unit circulating water outlet pipeline and the overflow vent 6a being arranged at water collecting basin top.
Preferably, in above-mentioned evaluating apparatus, described dosing unit comprises the first volume pump 23 be connected with moisturizing pond 3, the second volume pump 24 and the dosing tank be connected with water collecting basin.
Preferably, in above-mentioned evaluating apparatus, described simulation condenser 15 effective length is 1200mm-2000mm, the series connection of 4-10 root heat-transfer pipe is comprised in simulation condenser 15, heat-transfer pipe external diameter is selected from 19mm, 25mm or 32mm, single heat transfer length is 1000mm-1800mm, and the effective heat transfer length of single heat transfer is 700mm-1500mm.
Preferably, in above-mentioned evaluating apparatus, described natural cooling tower 22 tower diameter is 450mm-800mm, and tower height is 1200mm-1450mm, and filler is PVC waveform filler, and cooling tower 22 cooling range is 6 DEG C ~ 10 DEG C.
Preferably, in above-mentioned evaluating apparatus, the material of the parts directly contacted with seawater, concentrated seawater or medicament in described each unit is seawater corrosion resistance material or acid and alkali-resistance material.
The present invention also provides a kind of evaluation method of electric system circularly-cooling sea water treatment agent device for evaluating performance, it is characterized in that, comprise the steps: to open above-mentioned powder performance evaluating apparatus, make seawater circulation via after traffic monitoring unit, corrosion monitoring unit, temperature monitoring unit and simulation condenser, enter cooling tower unit, in the water collecting basin 6 in cooled seawater recycle covering water unit;
Wherein, detected by traffic monitoring unit and temperature monitoring unit, under making the condition of system stability, namely under the condition that the electric-heating water temperature made respectively in circulating seawer flow, circulating water outlet temperature and simulation condenser 15 is in target zone, detect, gather corrosion data, dirtiness resistance data and/or water quality testing data, control marine corrosion, fouling and/or bacterium algae growth performance to evaluate medicament;
Wherein, selectivity moisturizing is carried out by liquid level monitoring unit.
Preferably, in above-mentioned evaluation method, described corrosion monitoring unit comprises the online corrosion tester of galvanochemistry being arranged at import lacing film box 10 on heat exchange unit recirculated water source line and import corrosion probe 13, being arranged at outlet corrosion probe 19 on heat exchange unit circulating water outlet pipeline and outlet lacing film box 20 and being connected with described corrosion probe;
Described corrosive nature is detected and is realized by the heat-transfer pipe in corrosion monitoring unit and simulation condenser 15, comprises the combination of any one or two kinds of in following two kinds of methods:
(1) the import corrosion probe 13 on heat exchange unit circulating water pipework is connected with the online Corrosion monitoring instrument of galvanochemistry with outlet corrosion probe 19, realizes galvanochemistry on-line checkingi;
(2) detection is simulated the import lacing film box 10 in condenser 15 on heat-transfer pipe, heat exchange unit circulating water pipework and is exported the reduced gravity situations of test piece in lacing film box 20, realizes corrosion weight loss and detects.
Preferably, in above-mentioned evaluation method, be provided with corrosion sample in described water collecting basin 6, described corrosive nature detects and also comprises following method: the reduced gravity situations of corrosion sample in detected set pond 6, realizes corrosion weight loss and detects.
Preferably, in above-mentioned evaluation method, described cooling tower unit comprises natural cooling tower 22 in natural ventilation hyperbolic-type and filler, and described natural cooling tower coolant outlet communicates with described water collecting basin 6;
Preferably, in above-mentioned evaluation method, described traffic monitoring unit comprises the spinner-type flowmeter 9 be arranged on heat exchange unit source line, flow transmitter 11 and flow control valve 12;
Describedly electric-heating water temperature in circulating seawer flow, circulating water outlet temperature and simulation condenser 15 is in target zone undertaken by the method comprised the steps:
(1) monitoring of electric-heating water temperature is realized by the temperature sensor be installed on simulation condenser 15;
(2) monitor circulating water flow by spinner-type flowmeter 9 and flow transmitter 11, by flow control valve 12 autocontrol valve aperture, realize the control of cooling water flow;
(3) the circulating water outlet temperature recorded by outlet thermal bulb 18 realizes the control of circulating water outlet temperature.
Preferably, in above-mentioned evaluation method, the temperature of described electric-heating water controls at 40 DEG C ~ 85 DEG C; Described cooling water flow is heat-transfer pipe specification selectively, and holding tube maritime interior waters flow velocity is 0.6m/s ~ 2m/s setup control; Described circulating water outlet temperature is controlled in 40 DEG C ~ 50 DEG C.
Preferably, in above-mentioned evaluation method, realize fouling thermal resistance monitoring by described traffic monitoring unit and temperature monitoring unit, comprise the steps:
(1) during system stability, by import thermal bulb 14 and outlet thermal bulb 18 measures respectively clean pipe time refrigerated sea water inlet temperature t '
enterwith refrigerated sea water outlet temperature t ' during clean pipe
go out; Circulating water flow G is measured by flow transmitter 11; By the temperature sensor measurement electric hot water temperature T that simulation condenser 15 is installed;
(2) after system stability, every 2h, the instantaneous inlet temperature t of refrigerated sea water is measured respectively by import thermal bulb 14 and outlet thermal bulb 18
enterwith refrigerated sea water instantaneous output temperature t
go out, by following formulae discovery dirtiness resistance:
In formula, d
ifor heat-transfer pipe internal diameter in simulation condenser 15, n is the radical of heat-transfer pipe, and l is the effective length of single heat transfer in simulation condenser 15.
Preferably, in above-mentioned evaluation method, described evaluating apparatus also comprises blowdown unit, and it comprises the electric blowdown valve 21 be arranged on heat exchange unit circulating water outlet pipeline and the overflow vent 6a being arranged at water collecting basin top; Described monitoring unit also comprises pH monitoring unit and conductance monitoring unit.
Preferably, in above-mentioned evaluation method, this evaluation method also comprises and realizes blowdown operation by the Conductivity detection unit in blowdown unit and monitoring unit, it comprises the steps: that by conductance monitoring unit controlled circulation sea water conductivity be (30 ~ 100) ms/cm ± (50 ~ 500) us/cm, control the opening of electric blowdown valve (21), to realize blowdown.
Preferably, in above-mentioned evaluation method, described blowdown operation comprises the steps:
Controlled circulation sea water conductivity is that (30 ~ 100) ms/cm ± (50 ~ 500) us/cm realizes blowdown control rate of water make-up, blowdown flow rate and cycles of concentration, comprises the following steps:
(1) external purifying sea water is by seawater groove 1, is transported to moisturizing pond 3 through small pump 2, and seawater realizes moisturizing by filling pipe to water collecting basin 6 again.Wherein moisturizing pond 3 is provided with liquid level sensor 4, when monitoring seawater liquid level to lower bound, small pump opens moisturizing automatically, and when monitoring seawater liquid level is in limited time high, small pump is automatically closed and stopped moisturizing; And by ball-cock assembly 5 stability contorting water collecting basin 6 liquid level that water collecting basin is arranged and moisturizing, water collecting basin liquid level is caused to be increased beyond normal control in limited time when ball-cock assembly breaks down, by water collecting basin overflow vent 6a draining, the now liquid level change of water collecting basin exceedes normal level and sends alerting signal;
(2) experimentally room water disposal plan and engineering design requirements, setting seawater cycles of concentration N, control cycles of concentration N ± 0.2 or N ± 0.05, the conductivity of corresponding setting circulating seawer controls bound, when cycles of concentration or conductivity exceed in limited time, electric blowdown valve 21 is opened automatically, when cycles of concentration or conductivity arrive lower prescribing a time limit, electric blowdown valve 21 is closed automatically, realizes the stability contorting of automatic pollution discharge and cycles of concentration.
Preferably, in above-mentioned evaluation method, described evaluating apparatus also comprises dosing unit, and it comprises the first volume pump 23 be connected with moisturizing pond 3, the second volume pump 24 and the dosing tank be connected with water collecting basin;
Preferably, in above-mentioned evaluation method, described liquid level monitoring unit comprises the liquid level sensor 4 be arranged in moisturizing pond 3; Described pH monitoring unit comprises the pH sensor 7a be arranged in water collecting basin 6; Described conductance monitoring unit comprises the conductivity sensor 7b be arranged in water collecting basin 6.
Preferably, in above-mentioned evaluation method, this evaluation method also comprises dosing operation, and it passes through the moisturizing pond 3 in dosing unit, moisturizing unit and the liquid level monitoring unit in monitoring unit and pH monitoring unit and realizes, and comprises the steps:
(1) limit from lower bound to height in automatic water supplement process in moisturizing pond 3 seawater liquid level, the first volume pump 23 adds seawater corrosion inhibiting and descaling agent by seawater rate of water make-up is automatically proportional;
(2) implement demand according to seawater, circulating water quality situation and water disposal plan, setting circulating seawer control ph ± 0.1 or pH value ± 0.05, exceed the upper limit when detection pH in Circulating Water or prescribe a time limit down, the second volume pump 24 automatic switching acid adding or alkali;
(3) seawater bacterium algae biocide is by artificial or automatic feeding equipment, is regularly added in water collecting basin 6 by circulation volume is proportional.
Preferably, in above-mentioned evaluation method, also comprise water quality monitoring operation, it comprises following any one or two or more steps:
(1), in process of the test, pH value and the conductivity of circulating seawer is monitored respectively with described pH monitoring unit and conductance monitoring unit;
(2), in process of the test, seawater, the pH value of circulating seawer, conductivity, turbidity, basicity, chlorion, calcium ion, magnesium ion or iron ion content are synchronously detected in laboratory;
(3) in process of the test, the content of microorganism in periodic detection seawater, circulating seawer.
Compared with prior art, the invention has the beneficial effects as follows: present invention achieves seawater circulation water technology multiparameter on-line monitoring, multitask automatic control function and the aspect Comprehensive Assessment such as burn into dirt and microbiological manipulation, is the recirculation refrigerating technology special comprehensive evaluating apparatus using seawater as circulatory mediator that current First is developed for electric system.The optimal design of circularly-cooling sea water prescription case can being served effectively, providing support in electric system rapid and healthy for promoting marine circulating cooling system technology energetically.
Accompanying drawing explanation
Fig. 1 is electric system marine circulating cooling system dynamic simulation tester.
In figure, 1. seawater groove, 2. small pump, 3. moisturizing pond, 4. liquid level sensor, 5. ball-cock assembly, 6. water collecting basin, the overflow vent of 6a. water collecting basin, 7a.pH sensor, 7b. conductivity sensor, 8. ebullator, 9. spinner-type flowmeter, 10. import lacing film box, 11. flow transmitters, 12. flow control valves, 13. import corrosion probes, 14. import thermal bulbs, 15. simulation condensers, 16. hot water circulating pumps, 17. flow switches, 18. outlet thermal bulbs, 19. outlet corrosion probes, 20. outlet lacing film boxes, 21. electric blowdown valve, 22. natural cooling towers, 23. first volume pumps, 24. second volume pumps.
Embodiment
Be the simulation test device of circulatory mediator with seawater for electric system in view of also not having at present a set of, the present inventor is after studying with keen determination, embodiment of the present invention are proposed, in a preferred embodiment: the device (test unit schematic diagram as shown in Figure 1) mentioned in the present invention mainly comprises: simulation condenser (hot water), simulating nature ventilation seawater cooling tower, water collecting basin, sea water pump, pipeline, and the part such as automatic medicament feeding system, automatic water replenishing system, automatic blowdown system, process parameter monitoring system and computer management control system.In data acquisition and processing (DAP), achieve automatic record, the processing capacity of the parameters such as automatic monitoring testing temperature, flow, conductivity, cycles of concentration, pH, turbidity, rate of water make-up, chemical feeding quantity, corrosion rate, dirtiness resistance, cleanliness and test figure.
The operating process of said apparatus is: by circulating seawer is entered simulation condenser from cooling water collecting basin through water circulating pump, get back to cooling tower top after heat exchange, by getting back to pond after cooling tower (built with PVC ripple packing) cooling.Utilize the corrosive property of corrosion probe and lacing film test loop seawater in the process, by importing and exporting the fouling condition of temperature difference evaluation cycle seawater, by the microbiological manipulation of water sampling analysis at any time situation, and by evaluating the quality of water disposal plan to aspect Comprehensive Assessments such as burn into dirt and microbiological manipulation.
In another embodiment of the invention, the invention provides a kind of electric system circularly-cooling sea water treatment agent device for evaluating performance and method, it is characterized in that: device in laboratory conditions, under simulating the Parameter Conditions such as the flow velocity of electric power circulating cooling system, water quality, metal material, heat transfer intensity and temperature, evaluate the inhibition of seawater water treatment agent, scale inhibition and bactericidal performance, evaluate and determine best water disposal plan.
Wherein, the feature of above-mentioned electric system circularly-cooling sea water treatment agent device for evaluating performance is: whole plant running flow process is:
In water collecting basin 6, seawater enters spinner-type flowmeter 9 successively through ebullator 8, import lacing film box 10, flow transmitter 11, flow control valve 12, import corrosion probe 13, simulation condenser 15 heat-transfer pipe is entered after import thermal bulb 14, heat-transfer pipe and the electric-heating water of simulation condenser 15 carry out heat interchange, flow out simulation condenser 15 after seawater heats up and enter outlet thermal bulb 18, outlet corrosion probe 19, seawater nature cooling tower 22 is entered after outlet lacing film box 20, hot sea water flows through after the exchange of seawater nature cooling tower 24 filler generation heat and mass cools and flows back to water collecting basin 6, the electric-heating water of described simulation condenser 15, through bypass flow switch 17, heat-exchanger pump 16 circulates and flows into simulation condenser 15, moisturizing in water collecting basin 6 carries out supply by moisturizing pond 3, and seawater groove 1 carries out moisturizing by small pump 2 pairs of moisturizing ponds 3.
Wherein, electric system circularly-cooling sea water treatment agent device for evaluating performance comprises water charging system, heat-exchange system, cooling tower systems, drainage, medicine system, flow control system and temperature control system, it is characterized in that:
(1) water charging system: be made up of seawater groove 1, small pump 2, moisturizing pond 3, liquid level sensor 4 ball-cock assembly 5, water collecting basin 6 and moisturizing pipeline etc., controls moisturizing pond 3 and water collecting basin 6 liquid level, realizes automatic water supplement;
(2) heat-exchange system: simulation condenser (or boiler) 15 produces electric-heating water, and hot water temperature controls at 40 DEG C ~ 85 DEG C; Simulation condenser 15 effective length 1200mm ~ 2000mm; Many heat-transfer pipes of simulation condenser 15 design by φ 19, φ 25, φ 32, and a kind of specification is selected in each test, 4 ~ 10 heat-transfer pipes series connection, the long 1000mm ~ 1800mm of single heat transfer, and single heat transfer effectively conducts heat long 700mm ~ 1500mm; The excellent insulation material of simulation condenser (or boiler) 15 outer wall is incubated.
(3) cooling tower systems: natural cooling tower 22 adopts natural ventilation hyperbolic-type, tower body is made by fiberglass, PVC, tower diameter 450mm ~ 800mm, tower height 1200mm ~ 1450mm, pH sensor 7a, conductivity sensor 7b are set at the bottom of tower, in tower, the spray head engineering plastic pipe of fountain water-locator spiles to be uniformly distributed and is processed into, and filler adopts PVC waveform filler, filler support 316L stainless steel; Cooling tower cooling range 6 DEG C ~ 10 DEG C;
(4) drainage: be made up of the overflow vent and pipeline etc. of seawater conductivity sensor 7b and instrument, electric blowdown valve 21, water collecting basin 6, along with the concentrated rear conductivity of spontaneous evaporation system seawater raises, move blowoff valve 21 opening by monitoring circulating seawer conductivity automatic control electric, realize blowdown and control rate of water make-up, blowdown flow rate and cycles of concentration;
(5) medicine system: be made up of seawater groove 1, small pump 2, moisturizing pond 3, liquid level sensor 4, pH sensor 7a, the first volume pump (23), the second volume pump (24), dosing tank and pipeline etc., control moisturizing pond 3 liquid level and pH in Circulating Water, realize medicament automatic feeding;
(6) flow control system: be made up of ebullator 8, spinner-type flowmeter 9, flow transmitter 11, flow control valve 12 etc., setting test flow, circulating water flow is monitored by spinner-type flowmeter 9, flow transmitter 11, flow control valve 12 autocontrol valve aperture, flow control error ± (1% ~ 2%) in;
(7) temperature control system: be made up of outlet thermal bulb 18 and the temperature sensor and instrument, heating etc. of simulating condenser (or boiler) 15, setting circulating water outlet temperature is certain value of 40 DEG C ~ 50 DEG C of scopes, departure is in ± 0.2 DEG C, monitoring rate is to circulating water outlet temperature and setting value, automatic adjustment heating power, realizes circulating water outlet temperature stabilization and controls.
Wherein, electric system circularly-cooling sea water treatment agent device for evaluating performance comprises water charging system, heat-exchange system, cooling tower systems, drainage, medicine system, flow control system and temperature control system, it is characterized in that, in described each system, all select seawater corrosion resistance material, acid and alkali-resistance material with seawater, concentrated seawater, the direct contact component of medicament; Described each system connects PLC and computer management control system, realizes system cloud gray model management integrating control.
Above-mentioned electric system circularly-cooling sea water treatment agent device for evaluating performance is by simulating actual marine circulating cooling system system condition, Monitoring and Controlling process operation process, evaluate the performance that seawater water treatment agent controls marine corrosion, fouling, the growth of bacterium algae, comprehensive evaluation water disposal plan;
In above-mentioned electric system circularly-cooling sea water treatment agent device for evaluating performance, seawater water treatment agent Performance Appraisal System comprises corrosion monitoring system, dirtiness resistance (or cleanliness) monitoring system and water quality detection, specific features:
(1) corrosion monitoring system is made up of the heat-transfer pipe in the corrosion sample (test piece) imported and exported in lacing film box (10 and 20) and water collecting basin 6, simulation condenser 15, import and export corrosion probe (13 and 19) and the online corrosion tester of galvanochemistry etc., evaluates by corrosion weight loss and galvanochemistry on-line monitoring technique the performance that seawater water treatment agent controls marine corrosion;
(2) dirtiness resistance (or cleanliness) monitoring system is made up of the temperature sensor imported and exported on thermal bulb (14 and 18) and simulation condenser 15 and instrument, flow transmitter 11 and flow control valve 12 etc., by 15 hot water or the parameter such as vapor (steam) temperature, circulating water flow of stability contorting circulating water outlet temperature, condenser or boiler, calculate dirtiness resistance (or cleanliness) and evaluate the performance that seawater water treatment agent controls seawater fouling, the wherein computing formula of dirtiness resistance:
In formula:
R
sj---instantaneous dirtiness resistance, unit is square metre degree Celsius every watt of (m
2dEG C/W);
G---refrigerated sea water flow, unit is kilogram (kg/h) per hour;
T
enter---the instantaneous inlet temperature of refrigerated sea water, unit is degree Celsius (DEG C);
T
go out---refrigerated sea water instantaneous output temperature, unit is degree Celsius (DEG C);
T'
enter---refrigerated sea water inlet temperature during clean pipe, unit is degree Celsius (DEG C);
T'
go out---refrigerated sea water outlet temperature during clean pipe, unit is degree Celsius (DEG C);
T---hot water (or steam) temperature, unit is degree Celsius (DEG C);
D
i---heat-transfer pipe internal diameter, unit is rice (m);
The radical of n---heat-transfer pipe;
L---the effective heat transfer length of single heat transfer, unit is rice (m).
(3) water quality detection comprises the projects such as pH value, conductivity, turbidity, basicity, chlorion, calcium ion, magnesium ion, ferric ion and microorganism sampling detection, by seawater and circulating water quality testing and monitoring, to judge that evaluating seawater water treatment agent controls marine corrosion, fouling and bacterium algae growth performance.
In addition, electric system circularly-cooling sea water treatment agent device for evaluating performance of the present invention can be used for actual monitoring, also can be used as analogue means, simulate the cooling system operating mode of circularly-cooling sea water in different electric system, detection control process operation process, evaluates seawater water treatment agent performance.
Electric system circularly-cooling sea water treatment agent device for evaluating performance of the present invention and method is further illustrated below by specific embodiment.
In the following embodiments, each reagent used and the model of instrument and source are as shown in Table 1 and Table 2.
Agents useful for same and type information table in table 1 embodiment
Device therefor information table in table 2 embodiment
Embodiment one
As shown in Figure 1, described device comprises following unit to electric system circularly-cooling sea water treatment agent device for evaluating performance:
(1) moisturizing unit: comprise seawater groove 1, small pump 2, moisturizing pond 3, ball-cock assembly 5, water collecting basin 6 and moisturizing pipeline.Moisturizing pipeline connects seawater groove, small pump, moisturizing pond and water collecting basin successively, and ball-cock assembly is installed in water collecting basin.Control moisturizing pond and water collecting basin liquid level, realize automatic water supplement.
Described moisturizing pond material is PVC, and support and panel material are 304 stainless steels, and do plastic-blasting process; Described water collecting basin material is PVC, and the metal supporting structure of described water collecting basin 6, experiment porch adopts 304 stainless steels; Support materials 304 stainless steels, thickness is triangular steel or the square tube of 1.2.
(2) heat exchange unit: comprise boiler or simulation condenser 15, hot water circulating pump 16 and flow switch 17.Described simulation condenser 15 inside is provided with electrical heating elements, in order to produce electric-heating water, consistent with boiler function, and available boiler replaces.
Install 6 heat-transfer pipe series connection in described condenser (1300mm × 630mm × 500mm, 304 stainless steels), heat-transfer pipe diameter is 25mm, and single heat transfer length is 1200mm, and the effective heat transfer length of single heat transfer is 1000mm.
(3) cooling tower unit: comprise nature cooling tower 22 and filler.Cooling tower adopts natural ventilation hyperbolic-type, and tower body is made by PVC Polyvinylchloride and fiberglass, and the condensation-water drain of cooling tower communicates with water collecting basin, arranges conductivity sensor, pH sensor at the bottom of tower.
The tower diameter 600mm of cooling tower, tower height 1200mm, spray head material PVC in tower, spiles to be uniformly distributed and is processed into, and filler adopts PVC Polyvinylchloride waveform filler, filler support 316L stainless steel; Cooling tower cooling range 6 DEG C ~ 10 DEG C;
(4) blowdown unit: comprise the overflow vent 6a on conductivity sensor 7b and instrument, electric blowdown valve 21, water collecting basin and pipeline.
(5) dosing unit: comprise the first volume pump (23), the second volume pump (24), dosing tank and pipeline.Described first volume pump is connected with dosing tank with the second volume pump entrance, and the first volume pump outlet passes into moisturizing pond, and the second volume pump outlet passes into cooling tower water collecting basin.Control moisturizing pit level and pH in Circulating Water, realize medicament automatic feeding.
(6) monitoring unit: comprise traffic monitoring unit, temperature monitoring unit, corrosion monitoring unit, liquid level monitoring unit, pH monitoring unit and conductance monitoring unit.
(i) traffic monitoring unit: comprise ebullator 8, spinner-type flowmeter 9, flow transmitter 11, flow control valve 12.Wherein, described ebullator is connected with water collecting basin, and described spinner-type flowmeter, flow transmitter and flow control valve are arranged on the pipeline of heat exchange unit recirculated water entrance successively.
Setting test flow, detect circulating water flow by spinner-type flowmeter 9, flow transmitter 11, flow control valve 12 autocontrol valve aperture, flow control error ± (1% ~ 2%) in.
(ii) temperature monitoring unit: comprise and be arranged at heat exchange unit recirculated water source line and discharge pipe respectively and comprise import thermal bulb 14, outlet thermal bulb 18, be installed on temperature sensor on simulation condenser and the formation such as instrument, heating.
(iii) monitoring unit is corroded: between spinner-type flowmeter 9 and flow transmitter 11, be provided with import lacing film box 10, between flow control valve 12 and import thermal bulb 14, be provided with import corrosion probe 13, between outlet thermal bulb 18 and cooling tower top end entrance, be disposed with outlet corrosion probe 19 and outlet lacing film box 20.
(iv) liquid level monitoring unit: comprise the liquid level sensor 4 be arranged in moisturizing pond 3.
(v) pH monitoring unit: comprise the pH sensor 7a be arranged in water collecting basin 6.
(vi) conductance monitoring unit: comprise the conductivity sensor 7b be arranged in water collecting basin 6.
The process of the test of electric system evaluating apparatus is: in water collecting basin 6, seawater enters spinner-type flowmeter 9 successively through ebullator 8, import lacing film box 10, flow transmitter 11, flow control valve 12, import corrosion probe 13, the heat-transfer pipe of simulation condenser 15 is entered after import thermal bulb 14, heat-transfer pipe carries out heat interchange with the electric-heating water of simulation condenser, after seawater heats up, flowsheeting condenser enters outlet thermal bulb 18, outlet corrosion probe 19, seawater nature cooling tower is entered after outlet lacing film box 20, hot sea water flows through after the exchange of seawater cooling tower 24 filler generation heat and mass cools and flows back to water collecting basin, the electric-heating water of described simulation condenser, through bypass flow switch 17, heat-exchanger pump 16 circulates and flows into simulation condenser.Wherein, the moisturizing in water collecting basin 6 carries out supply by moisturizing pond 3, and seawater groove 1 carries out moisturizing by small pump to moisturizing pond.
Embodiment two
Can carry out Corrosion monitoring with electric system circularly-cooling sea water treatment agent device for evaluating performance described in embodiment one, concrete steps are:
(1) aldubra 6 (50mm × 25mm × 2mm) placed respectively by import lacing film box and outlet lacing film box, choose Tianjin seismic network seawater cleaning factory seawater (water quality is in table 3) and carry out moisturizing, first ON cycle water pump, then open simulation condenser;
Table 3 Tianjin seismic network seawater cleaning factory seawater quality data
| Analysis project | PH value | Conductivity (μ s/cm) | M basicity (mg/L) | Turbidity (mg/L) |
| Numerical value | 7.70 | 3.87×10 4 | 140 | 5 |
| Analysis project | Ca 2+(mg/L) | Mg 2+(mg/L) | SO 4 2－(mg/L) | Cl －(mg/L) |
| Numerical value | 360 | 1204 | 2340 | 17100 |
(2) control that hot water temperature reaches (75 ± 0.5) DEG C, cooling water flow reaches (1000 ± 10) kg/h and outlet water temperature reaches (45 ± 0.2) DEG C scope thus makes system stability;
(3) water collecting pool volume is 1000L, pilot system volume 500L, controls moisturizing pond and water collecting basin liquid level, realizes automatic water supplement.Along with the concentrated rear conductivity of spontaneous evaporation system seawater raises, moving blowoff valve opening by detecting circulating seawer conductivity automatic control electric, realizing blowdown and controlling rate of water make-up, blowdown flow rate and cycles of concentration.Test design cycles of concentration is 2.0 ± 0.2, and controlled circulation sea water conductivity is that 80ms/cm ± 200us/cm realizes blowdown control rate of water make-up, blowdown flow rate and cycles of concentration.The each automatic water supplement in moisturizing pond is 180L, and accumulation reaches 500L, and recirculated water cycles of concentration reaches 2.0 substantially, and system enters normal operating phase.From former seawater to concentrated, stable operational process, the data of other supervising devices are as shown in table 4:
The technological parameter of table 4 embodiment two electric power system stability timing
| Mensuration project | Concentrated operation starts | Reach cycles of concentration |
| PH value (7a) | 7.70 | 8.30 |
| Conductivity (7b) | 38.7ms/cm | 76ms/cm |
| Spinner-type flowmeter 9 measured value | 1000kg/h | 1006kg/h |
| Flow transmitter 11 measured value | 1003kg/h | 998kg/h |
| Import corrosion probe 13 measured value | <0.003mm/a | <0.003mm/a |
| Import thermal bulb 14 measured value | 37.00 | 37.02 |
| Outlet thermal bulb 19 measured value | 45.10 | 45.02 |
| Outlet corrosion probe 20 measured value | <0.004mm/a | <0.004mm/a |
| Cycles of concentration | 1.00 | 1.97 |
| Hot water temperature | 75.2℃ | 75.0℃ |
(4), in process of the test, control moisturizing pit level and pH in Circulating Water, realize medicament automatic feeding.Limit from lower bound to height in automatic water supplement process in moisturizing pond seawater liquid level, the first volume pump adds 180ml SW201 (table 1) by seawater rate of water make-up 180L is automatically proportional at every turn; Setup control circulating seawer pH value is 8.3 ± 0.1, when detection pH in Circulating Water is more than 8.4 second volume pump automatic switching acid addings, when detection pH in Circulating Water is closed automatically lower than 8.2 second volume pumps.Until system stable operation after 15 days, corrosion weight loss records the equal <0.003mm/a of rate of corrosion of aldubra test piece in import lacing film box and outlet lacing film box.
Embodiment three
Carry out fouling thermal resistance monitoring with electric system circularly-cooling sea water treatment agent device for evaluating performance described in embodiment one, concrete steps are:
(1) installing 6 diameters at simulation condenser is 25mm, the titanium alloy tube of wall thickness 0.5mm, effective heat transfer length is 1000mm, choose Tianjin seismic network purification plant seawater (water quality is in table 3) and carry out moisturizing, ON cycle water pump, carry out anti-incrustation corrosion inhibitor basis to add, then open boiler and stram condenser;
(2) control that vapor (steam) temperature reaches (80 ± 0.2) DEG C, cooling water flow reaches (1000 ± 10) kg/h and outlet water temperature reaches (45 ± 0.2) DEG C scope thus makes system stability;
(3) pilot system volume 500L, controls moisturizing pond and water collecting basin liquid level, realizes automatic water supplement.Along with the concentrated rear conductivity of spontaneous evaporation system seawater raises, moving blowoff valve opening by detecting circulating seawer conductivity automatic control electric, realizing blowdown and controlling rate of water make-up, blowdown flow rate and cycles of concentration.Test design cycles of concentration is 2.0 ± 0.2, and controlled circulation sea water conductivity is that 80ms/cm ± 200us/cm realizes blowdown control rate of water make-up, blowdown flow rate and cycles of concentration.The each automatic water supplement in moisturizing pond is 180L, and accumulation reaches 500L, and recirculated water cycles of concentration reaches 2.0 substantially, and system enters normal operating phase.From former seawater to concentrated, stable operational process, the data of other supervising devices are as shown in table 5:
The technological parameter of table 5 embodiment three electric power system stability timing
| Mensuration project | Concentrated operation starts | Reach cycles of concentration |
| PH value (7a) | 7.70 | 8.30 |
| Conductivity (7b) | 38.7ms/cm | 77ms/cm |
| Spinner-type flowmeter 9 measured value | 1000kg/h | 1003kg/h |
| Flow transmitter 11 measured value | 1003kg/h | 999kg/h |
| Import corrosion probe 13 measured value | <0.001mm/a | <0.001mm/a |
| Import thermal bulb 14 measured value | 37.00 | 37.02 |
| Outlet thermal bulb 19 measured value | 45.00 | 44.98 |
| Outlet corrosion probe 20 measured value | <0.001mm/a | <0.001mm/a |
| Cycles of concentration | 1.00 | 1.99 |
| Hot water temperature | 80.2℃ | 80.0℃ |
(4), in process of the test, control moisturizing pit level and pH in Circulating Water, realize medicament automatic feeding.Limit from lower bound to height in automatic water supplement process in moisturizing pond seawater liquid level, the first volume pump adds 180ml SW203A seawater anti-incrustation corrosion inhibitor (table 1) by seawater rate of water make-up 180L is automatically proportional at every turn; Setup control circulating seawer pH value is 8.3 ± 0.1, when detection pH in Circulating Water is more than 8.4 second volume pump automatic switching acid addings, when detection pH in Circulating Water is closed automatically lower than 8.2 second volume pumps.After system stable operation, every 2h automatically monitors and gathers one-time process parameter, the instantaneous dirtiness resistance of circularly-cooling sea water is detected over time by the computing formula of above-mentioned dirtiness resistance, after dirtiness resistance and the import and export temperature difference do not have significant change more than 2 days, stop test, measure annual fouling resistance and be less than 0.38 × 10
-4m
2dEG C/W, cleanliness are greater than more than 90%.
Embodiment four
Carry out water quality detection with electric system circularly-cooling sea water treatment agent device for evaluating performance described in embodiment one, concrete steps are:
(1) technological operation and system operational parameters are with embodiment three;
(2), in process of the test, control moisturizing pit level and pH in Circulating Water, realize the automatic feeding of anti-incrustation corrosion inhibitor.Limit from lower bound to height in automatic water supplement process in moisturizing pond seawater liquid level, the first volume pump adds 180ml SW203A (table 1) by seawater rate of water make-up 180L is automatically proportional at every turn; Setup control circulating seawer pH value is 8.3 ± 0.1, when detection pH in Circulating Water is more than 8.4 second volume pump automatic switching acid addings, when detection pH in Circulating Water is closed automatically lower than 8.2 second volume pumps; The basis of biocide SW303 before concentrated operation adds by system volume 500L, dosage 15mg/L, arrives cycles of concentration normal operating phase, by system volume 500L, dosage 15mg/L, adds 1 time in every 3 days, different phase, biocide is all directly added in water collecting basin.
Test (former seawater) and the typical water quality detection arrived when cycles of concentration (2.0 ± 0.2) normally runs before concentrated operation the results are shown in Table 6.
Typical water quality detection result during table 6 embodiment four Operation of Electric Systems
Find from above-described embodiment, utilize apparatus of the present invention and evaluation method, add seawater water treatment agent, control cycles of concentration 1.8 ~ 2.2, continuous operation about 15 days, result is: the corrosion rate of aldubra test piece is less than 0.003mm/a, and titanium alloy is almost corrosion-free; Tube surface is smooth, without any attachment; Heterotroph is less than 5 × 10
5cfu/ml.Every Con trolling index all reaches the technical indicator of regulation in GB/T 23248-2009 " circularly-cooling sea water Treatment Design specification ".Meanwhile, find to carry out single index detection or simultaneously full item Indexs measure to corrosion rate, dirtiness resistance and water quality detection index through a large amount of demonstration tests, testing result error is less, specific as follows:
(1) corrosion rate metrical error: under the same terms, gets the arithmetic mean of more than three sample parallel determinations as measurement result, the relative deviation of single parallel determinations and arithmetic mean be no more than arithmetic mean ± 10%; Single developmental tube to weigh for three times, the data such as dimensional measurement calculate measurement result, the relative deviation of each measurement result and three arithmetic mean be no more than arithmetic mean ± 5%.
(2) dirtiness resistance metrical error: under the same terms, gets the arithmetic mean of more than three contrast verification test findings as measurement result, the relative deviation of single checking measurement result and arithmetic mean be no more than arithmetic mean ± 10%; Automatically the dirtiness resistance calculated with computer system software is compared with the result utilizing artificial image data to calculate, and absolute error is less than 0.02m
2dEG C/W.
(3) water quality detection error: conventional water quality detection project all can reach the error range that respective standard requires.Wherein the continuous on-line monitoring result of the pH value of recirculated water and laboratory Analysis Results of Water Quality error are less than 0.1, and conductivity continuous on-line monitoring output control recirculated water cycles of concentration, error is less than 0.05.
Illustrate thus, electric system circularly-cooling sea water treatment agent device for evaluating performance of the present invention detects sensitive, and error is little, and evaluation method science is feasible, has broad application prospects.
Claims (15)
1. an electric system circularly-cooling sea water treatment agent device for evaluating performance, comprise moisturizing unit, heat exchange unit, cooling tower unit, blowdown unit, dosing unit and monitoring unit, it is characterized in that, described monitoring unit comprises the corrosion monitoring unit be arranged on heat exchange unit circulating water pipework, and described heat exchange unit comprises the simulation condenser (15) that inside is provided with electrical heating elements;
Wherein, moisturizing unit comprises moisturizing pond (3) and water collecting basin (6);
Wherein, described monitoring unit also comprises traffic monitoring unit, temperature monitoring unit and liquid level monitoring unit;
Wherein, described temperature monitoring unit comprises and is arranged at import thermal bulb (14) on heat exchange unit recirculated water source line and discharge pipe and outlet thermal bulb (18) respectively, and is arranged at the temperature sensor of the mensuration electric-heating water temperature in simulation condenser (15).
2. device for evaluating performance according to claim 1, wherein, described simulation condenser (15) external pipeline is provided with the flow switch (17) and the hot water circulating pump (16) that make the interior electric-heating water of condenser (15) form loop.
3. device for evaluating performance according to claim 1 and 2, wherein, described corrosion monitoring unit comprises and is arranged at import lacing film box (10) on heat exchange unit recirculated water source line and import corrosion probe (13), the outlet corrosion probe (19) be arranged on heat exchange unit circulating water outlet pipeline, outlet lacing film box (20) and the online corrosion tester of galvanochemistry be connected with described corrosion probe.
4. the device for evaluating performance according to any one of claim 1-3, wherein, described cooling tower unit comprises natural cooling tower (22) in natural ventilation hyperbolic-type and filler, and described natural cooling tower (22) coolant outlet communicates with described water collecting basin (6).
5. the device for evaluating performance according to any one of claim 1-4, wherein, described traffic monitoring unit comprises the ebullator (8) be arranged on heat exchange unit source line, spinner-type flowmeter (9), flow transmitter (11) and flow control valve (12).
6. the device for evaluating performance according to any one of claim 1-5, wherein, described monitoring unit also comprises pH monitoring unit and conductance monitoring unit; Described liquid level monitoring unit comprises the liquid level sensor (4) be arranged in moisturizing pond (3); Described pH monitoring unit comprises the pH sensor (7a) be arranged in water collecting basin (6); Described conductance monitoring unit comprises the conductivity sensor (7b) be arranged in water collecting basin (6).
7. the device for evaluating performance according to any one of claim 1-6, wherein, described blowdown unit comprises the electric blowdown valve (21) be arranged on heat exchange unit circulating water outlet pipeline and the overflow vent (6a) being arranged at water collecting basin top.
8. the device for evaluating performance according to any one of claim 1-7, wherein, described dosing unit comprises the first volume pump (23) be connected with moisturizing pond (3), the second volume pump (24) be connected with water collecting basin and dosing tank.
9. the device for evaluating performance according to any one of claim 1-8, wherein, the material of the parts directly contacted with seawater, concentrated seawater or medicament in described each unit is seawater corrosion resistance material or acid and alkali-resistance material.
10. the evaluation method of electric system circularly-cooling sea water treatment agent device for evaluating performance described in any one of claim 1-9, it is characterized in that, comprise the steps: to open powder performance evaluating apparatus according to claim 1, make seawater circulation via after traffic monitoring unit, corrosion monitoring unit, temperature monitoring unit and simulation condenser, enter cooling tower unit, in the water collecting basin (6) in cooled seawater recycle covering water unit;
Wherein, detected by traffic monitoring unit and temperature monitoring unit, under making the condition of system stability, namely under the condition that the electric-heating water temperature made respectively in circulating seawer flow, circulating water outlet temperature and simulation condenser (15) is in target zone, monitoring, collection corrosion data, dirtiness resistance data and/or water quality testing data, control marine corrosion, fouling and/or bacterium algae growth performance to evaluate medicament;
Wherein, selectivity moisturizing is carried out by liquid level monitoring unit.
11. evaluation methods according to claim 10, described corrosive nature monitoring is realized by the heat-transfer pipe in corrosion monitoring unit and simulation condenser (15), comprises the combination of any one or two kinds of in following two kinds of methods:
(1) the import corrosion probe (13) on heat exchange unit circulating water pipework is connected with the online Corrosion monitoring instrument of galvanochemistry with outlet corrosion probe (19), realizes galvanochemistry on-line checkingi;
(2) reduced gravity situations of the import lacing film box (10) in detection simulation condenser (15) on heat-transfer pipe, heat exchange unit circulating water pipework and the middle test piece of outlet lacing film box (20), realizes corrosion weight loss detection.
12. evaluation methods according to claim 10 or 11, wherein, are made the electric-heating water temperature in circulating seawer flow, circulating water outlet temperature and simulation condenser (15) be in target zone and are undertaken by the method comprised the steps:
(1) monitoring of electric-heating water temperature is realized by the temperature sensor be installed in simulation condenser (15);
(2) by spinner-type flowmeter (9) and flow transmitter (11) monitoring circulating water flow, by flow control valve (12) autocontrol valve aperture, the control of cooling water flow is realized;
(3) the circulating water outlet temperature recorded by outlet thermal bulb (18) realizes the control of circulating water outlet temperature.
13. evaluation methods according to claim 12, wherein, the temperature of described electric-heating water controls at 40 DEG C ~ 85 DEG C; Described cooling water flow is heat-transfer pipe specification selectively, and holding tube maritime interior waters flow velocity is 0.6m/s ~ 2m/s setup control; Described circulating water outlet temperature is controlled in 40 DEG C ~ 50 DEG C.
14. evaluation methods according to any one of claim 10-13, wherein, realize fouling thermal resistance monitoring by described traffic monitoring unit and temperature monitoring unit, comprise the steps:
(1) during system stability, by import thermal bulb (14) and outlet thermal bulb (18) measures respectively clean pipe time refrigerated sea water inlet temperature t '
enterwith refrigerated sea water outlet temperature t ' during clean pipe
go out; Circulating water flow G is measured by flow transmitter (11); By the upper temperature sensor measurement electric hot water temperature T installed of simulation condenser (15);
(2) after system stability, every 2h, the instantaneous inlet temperature t of refrigerated sea water is measured respectively by import thermal bulb (14) and outlet thermal bulb (18)
enterwith refrigerated sea water instantaneous output temperature t
go out, by following formulae discovery dirtiness resistance:
In formula, d
ifor heat-transfer pipe internal diameter in simulation condenser (15), n is the radical of heat-transfer pipe, and l is effective heat transfer length of single heat transfer in simulation condenser (15).
15. evaluation methods according to any one of claim 10-14, wherein, this evaluation method also comprises water quality monitoring operation, and it comprises following any one or two or more steps:
(1), in process of the test, pH value and the conductivity of circulating seawer is monitored respectively with described pH monitoring unit and conductance monitoring unit;
(2), in process of the test, seawater, the turbidity of circulating seawer, basicity, chlorion, calcium ion, magnesium ion or iron ion content are synchronously detected in laboratory;
(3) in process of the test, the content of microorganism in periodic detection seawater, circulating seawer.
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Application publication date: 20150408 |